Equity and Accumulated Other Comprehensive Loss (Common Share Repurchase) (Details) - USD ($) $ in Thousands							3 Months Ended
	Mar. 06, 2020	Mar. 06, 2020	Mar. 03, 2020	Feb. 25, 2020	Feb. 24, 2020	May 07, 2019	Mar. 31, 2020	Oct. 26, 2018
Stock Repurchase Program, Authorized Amount					$ 50,000			$ 50,000
Payments for repurchase of common stock							$ 4,995
Weighted average price of common shares				364,604
Period over which shares will be repurchased					18 months
Accelerated Share Repurchase Agreement [Member]
Payments for repurchase of common stock						$ 50,000
Stock repurchased and retired during period, shares						1,349,528
Percentage of expected shares repurchased						80.00%
Treasury stock, retired, cost method, amount						$ 40,000
Equity increase (decrease) related to shares repurchase program.						$ 10,000
Agreement Letter 10b18 [Member]
Stock Repurchase Program, Authorized Amount			$ 5,000
Treasury stock, retired, cost method, amount			$ 4,995
Total company common shares	242,634
Treasury shares
Treasury stock, retired, cost method, amount				$ (10,000)
Additional Paid-In Capital
Treasury stock, retired, cost method, amount				$ 10,000
Additional Paid-In Capital | Agreement Letter 10b18 [Member]
Treasury stock, retired, cost method, amount		$ 4,995